Transmission-gearing.



G. W. BULLEY.

TRANSMISSION GEARING.

APPLICATION FILED M127, 1911.

3 BREEZE-SHEET 1.

G. W. BULLEY. TRANSMISSION GEARING. APPLICATION FILED IEB.27, 1911,

1,026,073; Patented May 14, 19 12.

3 SHEETS-SHEET 2.

r V I llllll COLUMBIA PLANDURAPH c0.. WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

GEORGE W. BULLEY, OF CHICAGO, ILLINOIS, ASSIGNOB TO HOLSMAN EQUIPMENTCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TRANSMISSION-GEARING.

To all whom it may concern:

Be it known that I, GEORGE W. BULLEY, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Transmission-Gearing, ofwhich the following is a full, clear, and exact specification.

This invention relates generally to power transmitters also known astransmission gearing, and more particularly to the speed changingmechanism, and mechanism for changing the direction of drive employed inconnection with such gearing.

In some types of transmission gearing, one or more gear wheels areshifted from one position to another to effect the change of speed orthe direction of drive; in others these results are accomplished bytightening some suitable form of clutching or gripping device whichrenders active certain gears or elements of the transmission mechanismwhich have to do with the particular speed or direction of drivedesired. This invention relates more particularly to the latter class.In some species under this class the clutching or gripping meansconsists of a clutch which connects a driving element to a drivenelement (as for example, a normally loose gear to its shaft which iscontinually driven). In others, more commonly belonging to the planetarytype, a friction grip or band serves to hold one gear of a train fromrevolving bodily, thereby causing it to rotate on its own axis andimpart rotation to other gears of the train, as well understood in thisart. As an instance of the many adaptations of which the invention issusceptible, it has been shown in this application as applied to thelast named species of clutching or gripping means.

The invention has for its primary object to provide an improvedtransmission gearing in which the various clutching or gripping meansfor changing the speed or the direction of drive may be under thecontrol of a single element whereby its mode of operation will becomparatively simplified.

Other objects of the invention will appear from the followingspecification and the accompanying drawings illustrating an example ofthe invention, which is particularly pointed out in the claims.

In the said drawings'-Figure 1 is a plan section of a transmissiongearing embodying Specification of Letters Patent.

Application filed February 27, 1911.

Patented May 14, 1912. Serial No. 611,249.

this invention, taken on the line 11 Fig. 2. Fig. 2 is a transversesection thereof taken on the line 2-2 Fig. 1. Fig. 3 is a transversesection taken on the line 33 Fig. 1. Fig. 4 is an enlarged detail viewin plan section of certain parts hereinafter described. Fig. 5 is atransverse section on the line 5-5 Fig. 4:. Fig. 6 is an enlarged detailcross section taken on line 66 Fig. 1. Fig. 7 is a central plansectional view of the speed changing and reversing mechanism, thecontrolling parts being removed and the casing broken away.

6 is the driving shaft, 7 the driven shaft which may have any suitablemeans of transmitting its motion to the work, as, for eX- ample, a gearwheel 8, 9 the casing, and 11 and 12 the friction bands or clutchingbands of an ordinary planetary transmission gearing, all of which may beof the usual or any suitable construction. It is customary intransmission gearing of this type to provide the same withinstrumentalities whereby the rotation of the driving shaft 6 will beimparted to the driven shaft 7, either directly when clutch elementsconnected respectively with the driving and driven shafts are lockedtogether, or indirectly through a train or through one of a plurality ofseparate trains of gears capable of imparting diiferent speeds to thedriven shaft 7 from the con stant-speed drive-shaft 6 when one or theother of the clutch bands or gripping bands 11, 12, is tightened on thedrum 13, or 14:, which it surrounds.

In the drawings I have illustrated a form of clutch for establishingdirect connection between the drive shaft 6 and driven shaft 7, but anysuitable form of clutch well known in this art may be employed. In someforms the clutch members are operated by pivoted levers, such as thelevers 15 connected to a sliding collar 16 on the driveshaft 6 by anysuitable means, such as links 17, so that when the collar is pushed inone direction on the shaft, the clutch will be ap plied or locked, andwhen moved in the opposite direction, it will be released. The mechanismwhich I have illustrated is of this type. The collar is usually operatedin the described manner by a shifter 18, which may be of the usual orany suitable form, but in the mechanism shown the means for operatingthe shifter constitutes a part of this invention and will be presentlydescribed.

Referring more particularly to Fig. 7, it will be seen that within thegear housing 9, the driving shaft 6 is reduced in diameter and, carriedon this reduced portion, is an independent sleeve which in thisstructure constitutes the driven shaft 7. The inner end of the sleeveshaft 7 carries a pinion 50 and adjacent this pinion 50, is anotherpinion 57 of smaller diameter keyed to the shaft 6. These two pinionsare constantly in mesh with a plurality of groups of planetary gears.These groups of gears are each composed of three different diameteredpinions 52, 53 and 5 1, all integrally connected together and mounted onrespective shafts 55 which are journaled in the'rotatable drum 14:. Thegears 52 and 53 of these planetary groups mesh with the shaft pinions 50and 51 respectively, and gears 5e mesh with pinion 56 carried on the hubof the rotatable reversing drum 13. This structure is designed for twospeeds forward and one reverse, and as before stated, these speedchanges are brought about by the clutch or gripping bands 11 and 12. Itwill thus be seen that by moving or actuating the band 12 and therebyholding the drum 141 against rotation, the shaft 6 will drive shaft 7 inthe same direction through the medium of the gears 51,53,52 and 50, butat a slower speed on account of the different diameters of the piniens.The reverse speed is, as is clearly seen, accomplished by actuating theband 11 to hold drum 13 against rotation (drum 14 being released and.free to rotate). In this case the gear 56 is held stationary, and theplanetary .pinions are, as is well understood, caused to rotate bodilyin reverse directions to that of shaft 6 and thereby drive shaft 7 in acorresponding reverse direction, the speed of reverse rotation of shaft7 correspondi-ng .to the difference between the speed imparted to theplanetary pinions by the gears 56 and the shaft pinion 51. In order todrive the shaft 7 at the same speed forward as the drive shaft 6, theclutch previously referred to is used. In this structure a rotatabledisk 57 is mounted on the shaft '6 adjacent the drum 11 and hasperipheral teeth or lugs 58 adapted to engage with corresponding teethon the periphery of drum 11. When the disk 57 is shifted into engagementwith drum 11 by the collar 16, links 17, and shifter 18 heretoforementioned, it locks all of the rotatable parts to the shafts 6 and 7.

The grip or clutch bands l1, 12 are ordinarily provided with lugs 19,20, at their extremities arranged sufficiently apart to permit of radialexpansion and contraction of the band. One of these lugs, the lug 19, isadjustably held in position by an adjusting screw or stop 21 passingthrough a part of the casing and having its inner end arranged inposition to be impinged by the lug 19. The opposite lug 20 is the onewhich band is required in devices of this character for the reverse.Consequently, in this exemplification of the invention, one of the bands11, 12 when tightened, reverses in the driven shaft 7 the direction ofmotion received from the driving shaft 6, the band. 11 being thereversing band and being substantially the same in construction andoperation as the speed-change band 12. The means for tightening eitherof these bands 11, 12 at will constitute a part of this invention, andwill now be described.

Arranged adjacent the lug 20 of the lowspeed band 12 is a dog 22. Thisis movable with the lug 20 and is held in place in any suitable way, asby means of a pivot pin or screw 23 serving to hold the dog on a part ofthe casing while permitting it to move back and forth with the lug 20.The dog is provided on one side with a rounded bearing 24 which enablesit to work against the lug 20 without undue friction, and on the otherside it has a rounded end or hearing 25 with which engages a cam orincline 26 secured to a sliding rod 27 and so constructed, proportionedand arranged that when it engages the end 25 of the dog 22, the dog willbe forced over against the lug 20 and the low-speed band 12 will bethereby applied or gripped to its drum 14. The rod 27 is under thecontrol of the operator by any suitable means applied to the outer endsof the rod, not necessary to illustrate, and in order that the operatormay be able to determine when the incline 26 has reached the limit ofits wedging action, its apex is provided with a seat or notch 28 intowhich the rounded end 25 of the dog is adapted to snap when the two arein register, the dog being continually urged toward the incline 26' bythe elasticity of the band 12, as will be understood.

Arranged adjacent to the outer side of the lug 20 of the reverse band 11is a dog 29 similar in construction and its mode of support to the dog22, excepting that its outer end need not be rounded in the same way orfor the same purpose described with reference to the outer end of thedog 22. The dog 29, however, acts upon the lug 20 of band 11 in the samemanner as dog 22 acts upon the lug of band 12, and when crowded towardthe companion lug 19 of this band 11, causes the latter to grip its drum13 and thereby cause the shaft 7 to rotate in a direotion opposite thatin which the shaft 6 rotates. On the sliding rod 27 is a second inclinecam or wedge 30 arranged to engage the dog 29 at times when the incline26 is out of engagement with the dog 22, and the direct drive clutch isreleased. In order that the incline 30 may maintain its position ofengagement with relation to the dog 29, it may, if desired, be providedwith a straight face 31 arranged parallel with the rod 27, so that whenin engagement wit-h the dog, the pressure of the latter against theincline 30 will not tend to move the rod longitudinally. This same rod27 is utilized as a *means for controlling the clutch shifter 18 wherebythe clutch for connecting the driving shaft 6 directly with the drivenshaft 7 may be applied or released at the will of the operator by simplyshifting the rod longitudinally in the proper direction. The upper endof the shifter 18 is provided with a collar 32 which is arranged looselyon the rod 27, and carries means for locking itself to the rod 27 afterthe rod has been pushed a certain distance longitudinally for releasingboth of the bands 11, 12. With the parts in the posit-ion shown in thedrawings, the reverse band is applied, but when the transmissionmechanism is entirely out of action, with the driving shaft entirelydisconnected from the driven shaft, the incline 30 will occupy aposition to the right of the dog 29, while the incline 26 will assume aposition slightly to the left of the dog 22. In order to connect thedriving shaft di rectly with the driven shaft, it is of course desirableto first pass through the low speed position. If, therefore, themovement of the rod 27 be continued toward the right, in order to shiftthe collar 32 and apply the direct speed-clutch, the incline 26 willfirst encounter the dog 22 and apply the low speed band 12, and then, asit passes on beyond the dog 22, a means for moving the collar 32 withthe rod 27 becomes effective. In the exemplification of the inventionshown in the drawings, such a means consists of a simple shoulder 33formed on the rod 27 as a result of having one end of the rod largerthan the other. This shoulder 33 is so positioned with relation to theinclines 26, 30, that by the time the incline 26 passes beyond the dog22, going toward the right, such shoulder will come in contact with theend of the collar 32 and push the collar, together with the shifter 18,until the direct speed clutch is applied. The means before referred tofor establishing an operative connection between the collar 32 and therod 27 is utilized for releasing the high speed clutch or compelling thecollar 32 to 0 return with the rod 27 when the latter is the rod 27 whenthe latter is pushed the necessary distance for carrying the incline 26beyond the dog 22 toward the right. The dog 34 is caused to enter thenotch 36 by a cam or incline 37 formed on the main casing when theshoulder 33 engages the collar 32 and moves the dog 34 into engagementwith the incline 37. The dog 34 is held in the notch 36 during thefurther movement of the rod 27 toward the right by engaging a surface 38on the casing arranged parallel with the rod, and consequently when thereverse pull is imparted to the rod 27, it being desired to release thedirect speed clutch, the dog 34 will compel the collar 32 to follow withthe rod and to remain attached thereto until the incline 7 is againreached, whereupon the tail piece 39 on the dog 34 will encounter asecond incline 40 on the casing and positively release the dog 34 fromthe notch 36, thereby permitting the notch to recede within the collarand allowing the rod 27 its necessary freedom of movement for operatingeither of the dogs 22, 29 without disturbing the collar 32, it beingunderstood, of course, that the parts are so proportioned and arrangedthat before the incline 26 engages the dog 22 when moving toward theleft, the direct speed clutch will have been released by the movement ofthe collar 32 toward the left. It will also be observed that the dog 34constitutes a stop or lock for positively holding the collar 32 againstlongitudinal movement with the rod 27 until the shoulder 33 engages withthe collar and the dog has been forced into place in the notch 36,because the dog 34 is incapable of passing the incline 37 until thenotch 36 registers therewith, consequently danger of applying the directspeed clutch while one of the bands 11, 12, is applied, is avoided.

The rod 27 is slidably mounted in guide passages 41, 42, formed in thecasing and made of any desired shape in cross section suited to itssliding action. It is, of course, desirable, however, that it be heldagainst rotation to prevent the inclines 26, 30 from getting out of linewith their respective dogs, and consequently, when the rod iscylindrical like the example shown in the drawing, these inclines may beutilized as a means of holding the rod against rotation by so formingand situating them that one of them will always occupy the slot 43provided for their movement along the side of the guide passage 41.

l/Vhat I claim is:

1. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having a movable element which when operated effectsconnection between said driving and driven shafts, a movable actuatingmember having means for successively engaging and operating saidelements at different points along its path of movement, means forlocking one of said elements to said member at a given point along saidpath of movement, and means for releasing said locking means upon returnmovement of said actuating member.

2. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft em bodying a plurality of clutching orgripping means each having a movable element which when operated effectsconnection between the driving and driven shafts, a movable actuatingmember having means for successively engaging and operating saidelements at different points along its path of movement, means forlocking one of said elements to said actuating member at a given pointalong said path of movement, a lock-actuating element arranged to beengaged by a part of said locking means as the latter moves, to therebylock the looking means, and means for releasing said locking means uponreturn movement of said actuating member.

3. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft em bodying a plurality of clutching orgripping means each having a movable element which when operated effectsconnection between the driving and driven shafts, a slidable actuatingrod having means for engaging and operating one of said elements at agiven point along the path of movement of said rod, and locking meansfor locking another one of said elements to said rod at another givenpoint along said path of movement, including a locking dog adapted toengage said rod after the latter has moved a given distance withrelation to the dog.

4. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving shaft to the driven shaft embodying a plurality of clutching orgripping means each having an element which when operated efiectsconnection between the driving and driven shafts, a sliding actuatingrod having means for operating one of said elements at a given pointalong the line of movement of the rod, a locking dog mounted on anotherof said elements and movable therewith for locking said element andactuating rod together after the rod is moved a given distance withrelation to the latter said element, and a lock actuating means arrangedadjacent the line of movement of said dog and adapted to be engagedthereby for actuating the dog to lock the second said element andactuating rod together.

5. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having an element which when operated effectsconnection bet-ween the driving and driven shafts, a slidable actuatingrod having means for operating one of said elements at a given pointalong the path of movement of said rod, said rod having means forengaging and operating another one of said elements after moving a givendistance with relation thereto, a dog movable with the latter saidelement, said rod having a notch for the engagement of said dog, andmeans arranged adjacent the line of movement of said dog for forcing thedog into engagement with said notch and thereby locking the dog and rodtogether.

6. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having an element which when operated effectsconnection between the driving and driven shafts, a slidable actuatingrod having means for operating one of said elements, a locking dogmovable with another of said elements, said rod having means forengaging and operating the latter said element after moving a givendistance with relation thereto, said rod also having a notch for theengagement of said dog, means arranged adjacent the line of movement ofsaid dog for forcing it into engagement with said notch and therebylocking the rod and dog together when moved in one direction, and meansarranged adjacent the line of movement of the dog in the oppositedirection for releasing the dog at a given point along its line ofmovement.

7. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having a movable element which when operated effectsconnection between the driving and driven shafts, a slidable actuatingrod having means for operating one of said elements at a given pointalong its line of movement, said rod passing loosely through another ofsaid elements and having means for engaging and operating the lattersaid element after moving a given distance with relation thereto, meanscarried by the last said element for locking the latter and the rodtogether after the rod has moved a given distance with relation theretoin one direction, and means for releasing said looking means after therod has moved a given distance in the return direction.

8. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft em,- bodying a plurality of clutching orgripping means each having a movable element which when moved effectsconnect-ion between the driving and driven shafts, a slidable actuatingrod having means for moving one of said elements, another of saidelements being in the form of a collar through which said rod passes andis slidable a given distance with relation thereto, said actuating rodhaving a shoulder for engaging and moving said collar, and also having anotch, a dog mounted on said collar for engaging said notch when itregisters therewith, and an incline arranged adjacent the line ofmovement of said dog and adapted to be engaged thereby for forcing thedog into engagement with said notch and locking the rod and dogtogether.

9. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having a movable element which when moved effectsconnection between the driving and driven shafts, a slidable actuatingrod having means for moving two of said elements at different pointsalong its path of movement and a stop for holding one of said elementsagainst movement until said rod has moved a given distance.

10. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having a movable element which when moved effectsconnection between the driving and driven. shafts, a slidable actuatingrod having means for moving two of said elements at diflerent pointsalong its path of movement and a stop for holding one of said elementsagainst movement until said rod has moved a given distance, including adog movable with the latter said element and adapted to engage said rod,and an element arranged adjacent the line of movement of said dog andadapted to be engaged thereby and arrest its movement until the rod hasmoved a given distance.

11. In a device of the class described, the combination of a drivingshaft, a driven shaft, mechanism for transmitting motion from thedriving to the driven shaft embodying a plurality of clutching orgripping means each having a movable element which when moved effectsconnection between the driving and driven shafts, a frame or casinghaving a slotted guide passage, and an actuating rod slidable in saidpassage and provided with cams or inclines slidable in the slot of saidpassage for holding said rod against rotation and actuating said movableelements.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 23rd day of February, A.D. 1911.

G. W. BULLEY.

Witnesses:

G. H. SEEM, FRANoIs A. HOPKINS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

